Technical information

AN2317/D
6 Low-Cost Programming and Debugging Options for M68HC08 MCUs
The MON08 connector pinout for one MCU may not match the pinout for
another due to the different biasing requirements among the M68HC08 MCU
families. M68HC08 versions with smaller pin counts will generally have one or
two fewer pins in the MON08 connection. Table 1 shows the MON08 pin
number and target signal name for several popular M68HC08 MCUs.
MON08-Cyclone The MON08-Cyclone tool from P&E Microcomputer Systems
(www.pemicro.com) was developed to provide a better way to standardize the
monitor mode connection across the M68HC08 MCU Families. The
MON08-Cyclone supports programming and debugging of almost every
M68HC908 MCU in current production. The Cyclone pod connects between
the serial port of a PC and the target board. It also can be used as a stand-alone
programmer to program multiple assemblies. This feature makes an ideal way
to set up a production test fixture to program newly assembled circuit boards
without PC intervention.
The MON08 connector supplied with the Cyclone tool is the same 16-pin ribbon
cable that is found in the ICS kits. Two additional pins were populated to
provide the oscillator signal (OSC) and a switchable power supply (V
Out
) as
shown in Figure 2. The Cyclone automatically configures the pinout for the
M68HC08 MCU version so that only one hardware tool is necessary to program
and debug any M68HC908. P&E Microcomputer Systems also posts software
revisions on their Web site for regular updates and whenever a new M68HC08
MCU is introduced.
Table 1. Typical MON08-to-Target Mapping
MON08 Pin
Number
Target Pin Name
GP/GT JL/JK KX MR QY/QT
2V
SS
V
SS
V
SS
V
SS
V
SS
4RSTRST RST RST RST
6IRQIRQ IRQ IRQ IRQ
8 PTA0 NC PTA0 PTA0 PTA0
10 PTA7 PTB0 PTA1 PTC2 PTA4
12 PTC0 PTB1 PTB0 PTC3 PTA1
14 PTC1 PTB2 PTB1 PTC4 NC
16 PTC3 PTB3 NC NC NC
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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